Finding the Third Proportional to 140,156 and 215,436

Step by Step Solution

1. Step 1: Write the proportion equation
   140,156 : 215,436 = 215,436 : x
2. Step 2: Convert to fraction form
   140,156/215,436 = 215,436/x
3. Step 3: Cross multiply
   140,156x = 215,436 × 215,436
4. Step 4: Simplify right side
   140,156x = 46,412,670,096
5. Step 5: Solve for x
   x = 46,412,670,096/140,156
6. Step 6: Final answer
   x = 331,150.08